| From: "Mike Rapoport (IBM)" <rppt@kernel.org> |
| Subject: sh: initialize max_mapnr |
| Date: Tue, 14 Feb 2023 16:07:29 +0200 |
| |
| sh never initializes max_mapnr which is used by the generic implementation |
| of pfn_valid(). |
| |
| Initialize max_mapnr with set_max_mapnr() in sh::paging_init(). |
| |
| Link: https://lkml.kernel.org/r/20230214140729.1649961-3-rppt@kernel.org |
| Fixes: e5080a967785 ("mm, arch: add generic implementation of pfn_valid() for FLATMEM") |
| Reported-by: Guenter Roeck <linux@roeck-us.net> |
| Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> |
| Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> |
| Reviewed-by: David Hildenbrand <david@redhat.com> |
| Cc: Arnd Bergmann <arnd@arndb.de> |
| Cc: Geert Uytterhoeven <geert@linux-m68k.org> |
| Cc: Greg Ungerer <gerg@linux-m68k.org> |
| Cc: Rich Felker <dalias@libc.org> |
| Cc: Yoshinori Sato <ysato@users.sourceforge.jp> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| |
| --- a/arch/sh/mm/init.c~sh-initialize-max_mapnr |
| +++ a/arch/sh/mm/init.c |
| @@ -301,6 +301,7 @@ void __init paging_init(void) |
| */ |
| max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; |
| min_low_pfn = __MEMORY_START >> PAGE_SHIFT; |
| + set_max_mapnr(max_low_pfn - min_low_pfn); |
| |
| nodes_clear(node_online_map); |
| |
| _ |
